RNA4924-XL bearing: complete specifications & equivalents

Specification table

Source: catalog reference (HR1 2026-09-25) · extracted 2026-09-30

Parameters extracted from the official FAG Rolling Bearings catalogue (HR1 2026-09-25); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the RNA4924-XL model number is decoded

envelope 135×165×45 mm: 135 mm seat is the hardened and ground shaft journal itself — there is no inner ring, with a thin 15.0 mm radial section packed with small-diameter needle rollers C is 205 kN and C0 390 kN at the 135 mm seat; the C/C0 ratio of 0.53 is characteristic of a needle bearing — high static rating relative to dynamic in a compact 165 mm outside diameter the fatigue load limit Cur is 65 kN, the limiting speed 3,400 r/min and the thermal reference speed 2,250 r/min; for small needle bearings the reference speed can exceed the kinematic limit, so the lower of the two governs the application dynamic capacity per millimetre of bore is 1.52 kN/mm and per millimetre of width 4.56 kN/mm — the reason 45 mm-wide needle bearings routinely replace much larger ball or roller positions mass is 1.86 kg (1860 g), just 0.25 g per mm² of projected 165×45 mm envelope, which keeps unbalanced forces low in fast-actuating linkages the 135 mm bore puts this execution at the top of the HR1 range — the 165 mm outside diameter, 45 mm width and 1.86 kg mass are built for primary-industry load cases The thin 15.0 mm section makes the 1860 g bearing sensitive to seat geometry — a tapered or lobed journal preloads part of the needle set and shows up as local pitting With Cur 65 kN and a 3,400 r/min limiting speed the unit suits pivots, rocker arms, pumps and compact gear trains running on hardened pins The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 135×165×45 mm envelope. Typical applications include motorcycle and light-vehicle transmissions, connecting-rod small ends and two-stroke and compressor piston pins, where the 165 mm outside diameter and 205 kN dynamic rating match the duty. In motorcycle and light-vehicle transmissions the unit fits a compact 135 mm seat, and in connecting-rod small ends the 1.86 kg mass is part of the rotor inertia calculation. Designers also specify it for two-stroke and compressor piston pins, relying on the 45 mm width and the published 390 kN static rating. On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions. Adding an IR inner ring changes the envelope logic: the same outer assembly then fits a smaller shaft — recheck bore, clearance and ratings when substituting.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On reciprocating duty ensure the stroke rotates the full needle set, or brinelling occurs at the same roller positions.
• Adding an IR inner ring changes the envelope logic: the same outer assembly then fits a smaller shaft — recheck bore, clearance and ratings when substituting.
• Open ends draw contamination directly onto the needles; specify sealed or shielded positions in dusty environments rather than relying on grease alone.